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iii

WELDING SPARKS canSAFETY

CYLINDER may explode iii

 

cause fire or explosion.

 

if damaged.

 

6.a. Remove fire hazards from the welding area.

 

 

If this is not possible, cover them to prevent

 

7.a. Use only compressed gas cylinders

 

the welding sparks from starting a fire.

 

containing the correct shielding gas for the

 

Remember that welding sparks and hot

 

process used and properly operating

 

materials from welding can easily go through small cracks

 

regulators designed for the gas and

 

and openings to adjacent areas. Avoid welding near

 

pressure used. All hoses, fittings, etc. should be suitable for

 

hydraulic lines. Have a fire extinguisher readily available.

 

the application and maintained in good condition.

6.b. Where compressed gases are to be used at the job site,

7.b. Always keep cylinders in an upright position securely

 

special precautions should be used to prevent hazardous

 

chained to an undercarriage or fixed support.

 

situations. Refer to “Safety in Welding and Cutting” (ANSI

7.c. Cylinders should be located:

 

Standard Z49.1) and the operating information for the

 

• Away from areas where they may be struck or subjected to

 

equipment being used.

 

physical damage.

6.c. When not welding, make certain no part of the electrode

 

• A safe distance from arc welding or cutting operations and

 

circuit is touching the work or ground. Accidental contact can

 

 

cause overheating and create a fire hazard.

 

any other source of heat, sparks, or flame.

6.d. Do not heat, cut or weld tanks, drums or containers until the

7.d. Never allow the electrode, electrode holder or any other

 

proper steps have been taken to insure that such procedures

 

electrically “hot” parts to touch a cylinder.

 

will not cause flammable or toxic vapors from substances

7.e. Keep your head and face away from the cylinder valve outlet

 

inside. They can cause an explosion even though they have

 

been “cleaned”. For information, purchase “Recommended

 

when opening the cylinder valve.

 

Safe Practices for the Preparation for Welding and Cutting of

7.f.

Valve protection caps should always be in place and hand

 

Containers and Piping That Have Held Hazardous

 

Substances”, AWS F4.1 from the American Welding Society

 

tight except when the cylinder is in use or connected for

 

(see address above).

 

use.

6.e. Vent hollow castings or containers before heating, cutting or

7.g. Read and follow the instructions on compressed gas

 

cylinders, associated equipment, and CGA publication P-l,

6.f.

welding. They may explode.

 

“Precautions for Safe Handling of Compressed Gases in

Sparks and spatter are thrown from the welding arc. Wear oil

 

Cylinders,” available from the Compressed Gas Association

 

free protective garments such as leather gloves, heavy shirt,

 

1235 Jefferson Davis Highway, Arlington, VA 22202.

 

cuffless trousers, high shoes and a cap over your hair. Wear

 

FOR ELECTRICALLY

 

ear plugs when welding out of position or in confined places.

 

 

Always wear safety glasses with side shields when in a

 

 

welding area.

 

powered equipment.

6.g. Connect the work cable to the work as close to the welding

 

8.a. Turn off input power using the disconnect

 

area as practical. Work cables connected to the building

 

 

framework or other locations away from the welding area

 

switch at the fuse box before working on

 

increase the possibility of the welding current passing

 

the equipment.

 

through lifting chains, crane cables or other alternate circuits.

8.b. Install equipment in accordance with the U.S. National

 

This can create fire hazards or overheat lifting chains or

 

Electrical Code, all local codes and the manufacturerʼs

 

cables until they fail.

 

recommendations.

6.h. Also see item 1.c.

8.c. Ground the equipment in accordance with the U.S. National

 

 

 

Electrical Code and the manufacturerʼs recommendations.

 

 

Mar ʻ95

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Lincoln Electric SVM175-A service manual Cylinder may explode, Cause fire or explosion If damaged, For Electrically, Iii